Wiktionary
n. An abstract but formal representation of entity including their property, relationships and the operations that can be performed on them.
Wikipedia
An information model in software engineering is a representation of concepts and the relationships, constraints, rules, and operations to specify data semantics for a chosen domain of discourse. Typically it specifies relations between kinds of things, but may also include relations with individual things. It can provide sharable, stable, and organized structure of information requirements or knowledge for the domain context.
Usage examples of "information model".
A vast, bushy plant with poisonous-looking white flowers near the center of the information model stood as testament to all that Sellars knew about Jongleur.
His information model remained in complete and shocking disarray, and although several of the new patterns had continued to change and to grow, he still could make little sense of any of it.